State one relevant observation for the following reaction:
Addition of ethyl alcohol to acetic acid in the presence of concentrated Sulphuric acid.

What is observed in addition of ethyl alcohol to acetic acid in the presence of concentrated sulphuric acid ?

Concentrated sulphuric acid is:

State one relevant observation for the following reaction : Burning of ammonia in air.

State one relevant observation for the following reaction : Action of dilute Hydrochloric acid on iron (II) sulphide.

State one relevant observation for the reaction Action of concentrated nitric acid on copper.

Write balanced chemical equations for the following reactions : Heating ethanol at 443 K (130^@C) in the presence of concentrated sulphuric acid.

In esterification reaction of ethyl alcohol with acetic acid in presence of dry HCl gas

Fill in the blank from the choices given in brackets: State one relevant observation for the following reaction : Action of concentrated Sulphuric acid on hydrated copper sulphate.

State one relevant observation for the following: Action of dilute hydrochloric acid on lead, nitrate solution.

State one relevant observation for the reaction Zinc carbonate is heated strongly.